Other Index: <nnn> - index of other group for following operations
Multiply - multiplication of like components this with other group : (x1*x2, y1*y2, z1*z2)
Divide - division of like components this with other group : (x1/x2, y1/y2, z1/z2)
Add - sum of like components this with other group : (x1+x2, y1+y2, z1+z2)
Subtract - calculates azimuth and dip of particle motion (3-comp xyz groups)
Dot Product - vector dot product of this with other group
Cross Product - vector cross product of this with other group
Cross Correlation - cross-correlation of like components this with other group
Sum All - sum of like components of all other group into this group: (sum(x), sum(y), sum(z))